MEASUREMENTS OF ATMOSPHERIC BOIL.
Abstract
An apparatus for the measurement of atmospheric boil in terms of its effect in limiting the resolving power of telescopes and tracking cameras completed a series of experiments at tracking camera stations near Cape Canaveral, Florida. The apparatus and its use in those experiments is described in a report (SIO Ref. 63-24) by the Visibility Laboratory of the Scripps Institution of Oceanography, University of California, San Diego. The apparatus used by the Visibility Laboratory embodied a 6-inch diameter, 100-inch focal length telescope objective equipped with an iris diaphragm by means of which the entrance pupil of the instrument could be varied from one-half inch to six inches. It had been observed on some, but not all, occasions that the measured rms ray deviation was greater when the entrance pupil diameter was six inches than when it had some lesser value (e.g., four inches). This observation prompted the experiment on 10 May 1957, which was for the purpose of exploring the effect of increasing the entrance pupil diameter beyond six inches.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1963
- Accession Number
- AD0600918
Entities
People
- S. Q. Duntley